ISL8126IRZ-TK

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PMICs, or Power Management Integrated Circuits, are very useful in many different applications, such as circuit protection, system-level power management, signal integrity, or even clock distribution. In particular, voltage regulators and DC/DC switching controllers are components of power management circuits that offer advantageous solutions for different applications. The ISL8126IRZ-TK, from Intersil, is a multi-phase synchronous controller with integrated high-side and low-side MOSFET drivers intended for use in buck and boost voltage regulation as well as high- and low-side n-channel MOSFET applications. In this article, we will discuss the application fields and working principle of this device.

ISL8126IRZ-TK is designed to drive multiple phases in parallel to minimize ripple, noise and EMI (electromagnetic interference) radiation. It is ideal for application in audio, laptop DC/DC converters, medium and high power VRMs (Voltage Regulator Modules), blockchain server power supplies, and network communication infrastructure. This device features a high-power converter with integrated current sharing among phases, programmable over voltage protection (OVP), internal soft start, smooth transitions in and out of low frequency operation, inverting buck-boost converter capability, as well as integrated analog current sensing per phase. It is also capable of operating in either fixed frequency voltage mode control or in adjustable frequency voltage mode control. In addition, this device can be configured to provide full-on waveform symmetry control, pre-bias start-up for NTC-type temperature sensing, and adaptive voltage scaling for different input sources.

The ISL8126IRZ-TK is an easy-to-use device that allows for accurate control of DC-DC converters with high efficiency, low ripple and low noise. It consists of three main parts: an on-chip voltage reference, a voltage/current feedback amplifier and an internal clock. The on-chip reference is set to a known voltage and is used to compare the output voltage of the regulator with the reference voltage. The feedback amplifier amplifies the difference between the two and feeds it to the internal clock. This clock then modulates the pulse width of the switching devices within the regulator to maintain a constant voltage. The internal clock can also be externally clocked for higher resolution and control over the pulse width of the switching devices.

The device also integrates a variety of protection features, including an over-voltage protection (OVP) circuit which protects the system from over-voltages. It also allows for current protection, under-voltage lockout protection, over-temperature protection, output over-current protection, and output short-circuit protection. These features help protect the system even during power up or power down. Additionally, a dedicated output enable pin allows for external control of the device’s output.

The ISL8126IRZ-TK provides a very robust solution for DC-DC regulator applications. Its high-voltage reference, feedback amplifier and integrated current-mode modulation provide high efficiency and low noise. It is ideal for applications where there is a need to accurately control the output voltage and current. The integrated protection features help to ensure that the device and the system remain safe and reliable during operation. This device is also highly configurable, allowing for customizing for different types of applications. Furthermore, this device can be used as either a buck converter or a boost converter, making it a great choice for applications requiring both types of power regulation functionality.

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